qr-code

QR Code

Generate QR codes from text/URLs and decode QR codes from images.

Capabilities

• Generate QR codes from any text, URL, or data
• Customize QR code size and error correction level
• Save as PNG or display in terminal
• Read/decode QR codes from image files (PNG, JPG, etc.)
• Read QR codes from screenshots

Requirements

Install Python dependencies:

For Generation

pip install qrcode pillow

For Reading

pip install pillow pyzbar

On Windows, pyzbar requires Visual C++ Redistributable. On macOS: brew install zbar On Linux: apt install libzbar0

Generate QR Code

python scripts/qr_generate.py "https://example.com" output.png

Options:

• --size: Box size in pixels (default: 10)
• --border: Border size in boxes (default: 4)
• --error: Error correction level L/M/Q/H (default: M)

Example with options:

python scripts/qr_generate.py "Hello World" hello.png --size 15 --border 2

Read QR Code

python scripts/qr_read.py image.png

Returns the decoded text/URL from the QR code.

Quick Examples

Generate QR for a URL:

import qrcode
img = qrcode.make("https://openclaw.ai")
img.save("openclaw.png")

Read QR from image:

from pyzbar.pyzbar import decode
from PIL import Image
data = decode(Image.open("qr.png"))
print(data[0].data.decode())

Scripts

• scripts/qr_generate.py - Generate QR codes with customization options
• scripts/qr_read.py - Decode QR codes from image files